Distribution and speciation of cesium, strontium, and europium in the aqueous two-phase system milk-pectin

Macášek, F.; Gerhart, P.

doi:10.1007/bf02163238

Cited by 10 publications

(3 citation statements)

References 19 publications

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“…It is also important to consider the transfer of these manmade radionuclides to whey, because although whey was formerly used only for animal feed, it is now used in various ways within the human food chain. Studies performed on radionuclide transfer report differences that depend on the radionuclide involved: 137 Cs tends to concentrate in the aqueous phase and in whey (Wilson et al, 1988;Vosniakos et al, 1989;Macasek and Gerhart, 1994), whereas 90 Sr tends to concentrate mainly in cheese, fol-lowing Ca, which is its chemical analog (Geering et al, 1990;Macasek and Gerhart, 1994). Variations in radionuclide transfer according to the type of cheese are not well evaluated.…”

Section: Introductionmentioning

confidence: 99%

Variations in the transfer of radiocesium (137Cs) and radiostrontium (90Sr) from milk to cheese

Besson

Pourcelot

Lucot

2009

Journal of Dairy Science

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This study aimed to compare the transfer of 2 manmade radionuclides, radiocesium (137Cs) and radiostrontium (90Sr), from cow milk to whey and cheese in 3 different types of French cheese production with rennet coagulation. Most of the 137Cs was present in the aqueous phase and became concentrated in the whey. For 137Cs transfer to whey, the processing factor (Pf; i.e., the ratio of the activity concentrations) ranged between 0.86 and 1.30 (n = 12). The food processing retention factor (Fr), calculated using the processing efficiency, ranged between 0.85 and 1.19 (n = 9). No statistical difference of Pf and Fr to whey is identified for 137Cs and the cheese products. The Pf calculated for 90Sr transfer to cheese ranged between 3.95 and 12.16, with significant differences depending on the type of cheese. In addition, a linear correlation is observed between 90Sr Pf to cheese and the Ca level in the cheese (r2 = 0.57). Thus, the Pf is enhanced in hard cheeses that are enriched in calcium. This is confirmed by nearly constant Fr values, ranging between 0.66 and 0.83.

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Section: Introductionmentioning

confidence: 99%

Variations in the transfer of radiocesium (137Cs) and radiostrontium (90Sr) from milk to cheese

Besson

Pourcelot

Lucot

2009

Journal of Dairy Science

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“…The mineral distribution between the soluble and colloidal phases of milk is heterogeneous. Temperature, pH and citrate content are the principal physical and chemical factors likely to change mineral distribution: saline concentration in the soluble phase increases when: (a) pH and temperature decrease, and (b) citrate [27,29,50]. At pH 6.6-6.8, less than 50% of the strontium content is exchangeable.…”

Section: Milk Compositionmentioning

confidence: 99%

“…Though precipitation steps are frequently used, they are tedious [16] and must often be repeated several times [29] to obtain adequate purity of strontium. They consequently lead to large losses of strontium.…”

Section: Precipitationmentioning

confidence: 99%

Methodology for determination of radiostrontium in milk: a review

Brun

Kergadallan

Boursier

et al. 2003

Lait

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-This paper presents a review on all available analytical methods for 90 Sr and 89 Sr determination in milk. Special attention was focused on the parameter of the performing time in order to assess the rapid measurement of milk contamination, especially in the case of emergency situations such as a nuclear plant accident. Preliminarily, a short description of the milk matrix and radiostrontium transfer from soil to milk and its derivatives is given. Then analytical procedures are examined step by step. 90 Sr and 89 Sr can be separately determined in less than 2 days by a rapid sample pretreatment and the use of a liquid scintillation detector.Strontium / radioactivity / analytical method / milk Résumé -Revue des méthodes de dosage du radiostrontium dans le lait. Cet article présente l'ensemble des méthodes analytiques disponibles pour le dosage du 90 Sr et du 89 Sr dans le lait. Cette étude attache une importance toute particulière à la durée d'analyse dans le but d'une estimation rapide de la contamination du lait telle qu'elle est rendue nécessaire dans le cas de situations d'urgences comme l'accident d'une centrale nucléaire. En préliminaires, une rapide description de la matrice lait et du transfert du radiostrontium du sol au lait et ses dérivés est donnée. Puis, les procédures analytiques sont examinées étape par étape. Les isotopes 90 et 89 du strontium peuvent être déterminés séparément en moins de 2 jours par un traitement rapide de l'échantillon et l'utilisation d'un détecteur à scintillation liquide. Strontium / radioactivité / méthode d'analyse / lait

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Metal speciation in biological fluids — a review

et al. 1996

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Abstract. The literature on the speciation of metal ions in biological fluids is comprehensively reviewed. Critical examination on this subject reveals that major work has been done in blood and urine. Speciation in materials like milk has not yet been widely studied. On the other hand, only few references could be found on sweat, saliva, cell lysate, cerebrospinal, seminal, tear and bronchoalveolar fluids. The topics studied for these fluids were mainly the speciation of arsenic, mercury, aluminium and selenium. Work on the speciation of other elements like zinc, chromium, cadmium, lead, copper, iron etc. have also been carried out in such matrices. The present literature survey includes also a critical comment about the sampling and storage of the fluids, general methodologies and analytical details of the developed methods for studying such metal ion speciation.

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Distribution and speciation of cesium, strontium, and europium in the aqueous two-phase system milk-pectin

Cited by 10 publications

References 19 publications

Variations in the transfer of radiocesium (137Cs) and radiostrontium (90Sr) from milk to cheese

Variations in the transfer of radiocesium (137Cs) and radiostrontium (90Sr) from milk to cheese

Methodology for determination of radiostrontium in milk: a review

Metal speciation in biological fluids — a review

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